A88/100
GSWC - ARTESIA — Water Quality Report 2026
Serving 50,375 people · California
Water Source
Groundwater
County
—
System ID
CA1910004
Violations
2
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 250.00 µg/L | — | Above Goal |
1,4-dioxane | 4.40 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2005.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About GSWC - ARTESIA
Is GSWC - ARTESIA water safe to drink?
GSWC - ARTESIA water receives a grade of A (88/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has GSWC - ARTESIA detected?
66 contaminants were tested in GSWC - ARTESIA's water. Notable contaminants include chlorate, 1,4-dioxane. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does GSWC - ARTESIA have any EPA violations?
Yes, GSWC - ARTESIA has 2 EPA violation(s) on record, with the most recent in 2005. Violation types include MCL, Other. 1 are health-based violations.
How many people does GSWC - ARTESIA serve?
GSWC - ARTESIA serves approximately 50,375 people, California.
What type of water does GSWC - ARTESIA provide?
GSWC - ARTESIA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910004.
How does GSWC - ARTESIA compare to other utilities in California?
GSWC - ARTESIA scores 88/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.